1) Tính a) 27^3 : 3^7 b) 5 – (`(-5)/(11)`^0) + (`(1)/(3)`^2) : 3 17/07/2021 Bởi Lydia 1) Tính a) 27^3 : 3^7 b) 5 – (`(-5)/(11)`^0) + (`(1)/(3)`^2) : 3
a. ${27^3 : 3^7}$ ${(3^3)^3:3^7}$ ${3^9:3^7}$ $3^{2}$ = 9 b. ${5-(\dfrac{-5}{11}^0)+(\dfrac{1}{3}^2):3}$ ${5-1+\dfrac{1}{9}:3}$ ${5-1+\dfrac{1}{27}}$ ${4+\dfrac{1}{27}}$ $\dfrac{109}{27}$ Bình luận
Giải thích các bước giải: a) `27^3:3^7` `=(3^3)^3:3^7` `=3^9:3^7` `=3^2=9` b) `5-(-5/11)^0+(1/3)^2:3` `=5-1+1/9:3=` `=4+1/27` `=109/27` Bình luận
a. ${27^3 : 3^7}$
${(3^3)^3:3^7}$
${3^9:3^7}$
$3^{2}$ = 9
b. ${5-(\dfrac{-5}{11}^0)+(\dfrac{1}{3}^2):3}$
${5-1+\dfrac{1}{9}:3}$
${5-1+\dfrac{1}{27}}$
${4+\dfrac{1}{27}}$
$\dfrac{109}{27}$
Giải thích các bước giải:
a) `27^3:3^7`
`=(3^3)^3:3^7`
`=3^9:3^7`
`=3^2=9`
b) `5-(-5/11)^0+(1/3)^2:3`
`=5-1+1/9:3=`
`=4+1/27`
`=109/27`